[1] https://en.wikipedia.org/wiki/Orders_of_magnitude_(energy)

Enough energy to heat 1 kg of water by 86°C (or 86 kg of water by 1°C).

The average failure state of a battery is not similar to detonating a handful of TNT on an airplane, which is a more instantaneous explosion. Sure, some battery failure states are violent and would unquestionably be a cause for an airplane to call a mayday and land, but something like puncturing a soft-cell battery is still a slower release than TNT.

We should just expect people to get better at understanding useful units — I'd prefer someone learns Wh since it is indeed a useful metric—kWh is the usual major unit of energy at home, and Wh is just smaller than that.

I've heard of people ordering 18650s online and getting them along with a free flashlight in which they came; I wonder if this regulation is why.

The battery limit described is for individual passengers, not air freight.

Slightly off topic, but she does an amazing job.

Green Dot Aviation: https://www.youtube.com/watch?v=T7uw6VzWHcM

Mentour Pilot: https://www.youtube.com/watch?v=Y50saxfTqQA

And people dont travel with single device anymore. My usually setup has 72wh powerbank, ~20wh phone and 90wh laptop, and various smaller gadget. They are reaching nearly 200wh

One time I had an old phone with battery removed in checked luggage and when I arrived at my destination, I saw they fiddled with the tsa lock and the phone was taken out of the envelope I had it in and just lying on top of my clothes. I mean maybe they saw it in an xray and wanted to steal it and then saw it was some old junk phone, no idea how good the xrays come out to tell beforehand whether you're dealing with an iPhone or 7 year old android midrange...